Aaron Alexis' mom: 'I don't know why' he did it

The mother of Navy Yard shooting suspect Aaron Alexis says she doesn't know why her son did what he did and now she'll never be able to ask him.

http://archive.federaltimes.com/VideoNetwork/2680087952001/Aaron-Alexis-mom-I-don-t-know-why-he-did-ithttp://archive.federaltimes.com/VideoNetwork/2680087952001/Aaron-Alexis-mom-I-don-t-know-why-he-did-ithttp://bc_gvpc.edgesuite.net/img/963482463001/201309/1402/963482463001_2679975301001_thumbnail-for-video-2680075410001.jpgAaron Alexis' mom: 'I don't know why' he did itThe mother of Navy Yard shooting suspect Aaron Alexis says she doesn't know why her son did what he did and now she'll never be able to ask him.18newsbestnavy yard shootingaaron alexis mom speakswashington dcnavyNational Newsmother of navy yard shooting00:34